功能外科 / 微创外科 / 腹部无切口 / 经直肠肛门外翻切除标本 / 腹腔镜 / 低位直肠癌根治术

functional surgery / minimally invasive surgery / no abdominal incision;  / transanal rectal eversion and specimen resection / laparoscopy / radical resection of low rectal carcinoma.